Which signs and symptoms are typical of pneumonia?

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Pneumonia typically causes both systemic and lung-specific signs of infection. A fever with chills reflects the body’s response to the bacterial or viral invader. A productive cough with sputum indicates that inflammatory exudate is filling the airways and air sacs, a hallmark of lung consolidation. Pleuritic chest pain comes from irritation of the pleura as the lungs expand and contract during breathing. Together, these findings point to pneumonia and help distinguish it from conditions that don’t cause fever or productive sputum.

In contrast, headache alone or abdominal pain alone don’t reflect the lung infection process, and a dry cough with no fever is less consistent with typical pneumonia in adults (though atypical presentations can occur). So the description that includes fever and chills, a productive cough with sputum, and pleuritic chest pain best fits the usual pneumonia picture.